From: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
To: "Alice Ryhl" <aliceryhl@google.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Wedson Almeida Filho" <wedsonaf@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <benno.lossin@proton.me>,
"Andreas Hindborg" <a.hindborg@samsung.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>, "Will Deacon" <will@kernel.org>,
"Waiman Long" <longman@redhat.com>,
"Tiago Lam" <tiagolam@gmail.com>,
"Thomas Gleixner" <tglx@linutronix.de>
Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 4/4] rust: sync: update integer types in CondVar
Date: Thu, 4 Jan 2024 11:19:34 -0300 [thread overview]
Message-ID: <3d6d8098-f303-4767-9ba2-e7a80433a4c2@gmail.com> (raw)
In-Reply-To: <20240104-rb-new-condvar-methods-v3-4-70b514fcbe52@google.com>
On 1/4/24 11:02, Alice Ryhl wrote:
> Reduce the chances of compilation failures due to integer type
> mismatches in `CondVar`.
>
> When an integer is defined using a #define in C, bindgen doesn't know
> which integer type it is supposed to be, so it will just use `u32` by
> default (if it fits in an u32). Whenever the right type is something
> else, we insert a cast in Rust. However, this means that the code has a
> lot of extra casts, and sometimes the code will be missing casts if u32
> happens to be correct on the developer's machine, even though the type
> might be something else on a different platform.
>
> This patch updates all uses of such constants in
> `rust/kernel/sync/condvar.rs` to use constants defined with the right
> type. This allows us to remove various unnecessary casts, while also
> future-proofing for the case where `unsigned int != u32`.
>
> I wrote this patch at the suggestion of Benno in [1].
>
> Link: https://lore.kernel.org/all/nAEg-6vbtX72ZY3oirDhrSEf06TBWmMiTt73EklMzEAzN4FD4mF3TPEyAOxBZgZtjzoiaBYtYr3s8sa9wp1uYH9vEWRf2M-Lf4I0BY9rAgk=@proton.me/ [1]
> Suggested-by: Benno Lossin <benno.lossin@proton.me>
> Reviewed-by: Tiago Lam <tiagolam@gmail.com>
> Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
> Reviewed-by: Benno Lossin <benno.lossin@proton.me>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
> ---
> [...]
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
next prev parent reply other threads:[~2024-01-04 14:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-04 14:02 [PATCH v3 0/4] Additional CondVar methods needed by Rust Binder Alice Ryhl
2024-01-04 14:02 ` [PATCH v3 1/4] rust: sync: add `CondVar::notify_sync` Alice Ryhl
2024-01-04 18:56 ` Boqun Feng
2024-01-04 14:02 ` [PATCH v3 2/4] rust: time: add msecs to jiffies conversion Alice Ryhl
2024-01-04 14:02 ` [PATCH v3 3/4] rust: sync: add `CondVar::wait_timeout` Alice Ryhl
2024-01-04 22:18 ` Boqun Feng
2024-01-05 10:30 ` Alice Ryhl
2024-01-04 22:44 ` Boqun Feng
2024-01-04 14:02 ` [PATCH v3 4/4] rust: sync: update integer types in CondVar Alice Ryhl
2024-01-04 14:19 ` Martin Rodriguez Reboredo [this message]
2024-01-04 22:47 ` Boqun Feng
2024-01-05 9:44 ` Alice Ryhl
2024-01-04 14:17 ` [PATCH v3 0/4] Additional CondVar methods needed by Rust Binder Alice Ryhl
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